JP4977305B2 - Controlled deployment delivery system - Google Patents

Controlled deployment delivery system Download PDF

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JP4977305B2
JP4977305B2 JP2003162704A JP2003162704A JP4977305B2 JP 4977305 B2 JP4977305 B2 JP 4977305B2 JP 2003162704 A JP2003162704 A JP 2003162704A JP 2003162704 A JP2003162704 A JP 2003162704A JP 4977305 B2 JP4977305 B2 JP 4977305B2
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stent graft
delivery system
outer tube
deployment
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ティー. ライト マイケル
ダブリュ. ロステッター ティモシー
ルイズ アレックス
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メドトロニック ヴァスキュラー インコーポレイテッド
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95Instruments specially adapted for placement or removal of stents or stent-grafts
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95Instruments specially adapted for placement or removal of stents or stent-grafts
    • A61F2002/9505Instruments specially adapted for placement or removal of stents or stent-grafts having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95Instruments specially adapted for placement or removal of stents or stent-grafts
    • A61F2/962Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
    • A61F2/966Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
    • A61F2002/9665Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod with additional retaining means

Description

本出願は、2002年7月6日に出願された仮出願第60/387,278号の一部継続出願であり、これによってそれからの優先権を主張する。   This application is a continuation-in-part of provisional application 60 / 387,278, filed on July 6, 2002, and claims priority therefrom.

本発明は、一般には医療デバイスおよび処置に関し、特に、脈管系においてステントグラフトを展開する方法およびシステムに関する。   The present invention relates generally to medical devices and procedures, and more particularly to methods and systems for deploying stent grafts in the vascular system.

血管または生体の他の類似器官における移植のための補綴は一般に、医療技術において周知である。例えば、損傷を受けたまたは閉塞した天然の血管を置き換えるためまたはバイパスするために、生物学的適合性の物質(例えば、Dacronすなわち発泡させた多孔性のポリテトラフルオロエチレン(PTFE)管材料)で形成された補綴脈管グラフトが使用されている。枠組によって支持されたグラフト物質は、ステントグラフトまたは管腔内グラフトとして公知である。一般に、脈管動脈瘤および、病気によって薄くされまたは厚くされた管壁の治療または分離(管腔内修復または排除)のためのステントグラフトの使用は周知である。多くのステントグラフトが「自己拡張性」である。すなわち、圧縮されまたは収縮された状態で脈管系に挿入され、そして拘束が除かれた後に拡張が可能にされる。自己拡張性のステントグラフトは、典型的には、外へ向かう半径方向の力を付与するように形づくられた(例えば、曲げられたまたは切断された)ワイヤまたはチューブを使用し、そして適切な弾性物質、例えばステンレス鋼またはNitinol(ニッケル−チタン)を使用する。さらに、Nitinolは、形状記憶特性を使用し得る。自己拡張性ステントグラフトは典型的には、ステントグラフトが使用されることが意図される血管の直径よりもわずかに大きい直径の管状形状に形づくられる。一般に、外傷性または侵略的な方法で挿入するよりもむしろ、ステントおよびステントグラフトは、好ましくは、あまり侵略的でない管腔内デリバリーによって展開される。すなわち、都合の良い(そしてあまり外傷性でない)入口点で、皮膚を通り抜けてまたは連続する拡張によって経皮的に管腔または脈管構造に近づき、そして補綴が展開されるべき部位へ管腔を通ってステントグラフトを送ることによって展開される。   Prostheses for implantation in blood vessels or other similar organs of the body are generally well known in the medical arts. For example, with biocompatible materials (eg, Dacron or expanded porous polytetrafluoroethylene (PTFE) tubing) to replace or bypass a damaged or occluded natural blood vessel A formed prosthetic vascular graft is used. The graft material supported by the framework is known as a stent graft or endoluminal graft. In general, the use of stent grafts for the treatment or separation (intraluminal repair or elimination) of vascular aneurysms and vessel walls that have been thinned or thickened by disease is well known. Many stent grafts are “self-expanding”. That is, it is inserted into the vasculature in a compressed or deflated state and allowed to expand after the restraint is removed. Self-expanding stent grafts typically use wires or tubes that are shaped (eg, bent or cut) to impart an outward radial force, and suitable elastic materials For example, stainless steel or Nitinol (nickel-titanium) is used. In addition, Nitinol may use shape memory properties. Self-expanding stent grafts are typically shaped into a tubular shape with a diameter slightly larger than the diameter of the blood vessel for which the stent graft is intended to be used. In general, rather than inserting in a traumatic or invasive manner, stents and stent-grafts are preferably deployed by less invasive intraluminal delivery. That is, at a convenient (and less traumatic) entry point, through the skin or by continuous dilation, percutaneously approaches the lumen or vasculature, and the lumen to the site where the prosthesis is to be deployed. Deployed by sending the stent graft through.

1例における管腔内展開は、相互に軸方向に移動するために配置された共軸の内管(プランジャー)および外管(鞘)を有するデリバリーカテーテルを使用して行われる。ステントグラフトは、圧縮され、そして外部カテーテル管の遠位端内で内管の前に配置される。次いでカテーテルが誘導され、カテーテル(およびステントグラフト)の端が、意図される治療部位付近に置かれるまで、典型的には、管腔(例えば、脈管)を通って送られる。内管は次いで、静止を保たれ、一方、デリバリーカテーテルの外管は抜き出される。内管は、外管が抜き出されるとき、ステントグラフトが後ろに動くのを防止する。外管が抜き出されるとき、ステントグラフトは、ステントグラフトの近位端から遠位端へ徐々に暴露され、ステントグラフトの暴露された部分は、拡張した部分の少なくとも一部が、管腔の内側、例えば血管壁、の一部と実質的に適合して表面接触するように、半径方向に拡張する。展開の際、ステントグラフトの近位端は、心臓に最も近い端であり、遠位端は、心臓から最も離れた端である。これに対して、注意すべきことは、カテーテルの遠位端は通常、オペレーターから最も遠い端と一致し、一方、カテーテルの近位端は、オペレーターに最も近い端であることである。接近位置に応じて、ステントグラフトおよびデリバリーシステムの説明は一致し、あるいは逆であり得る。以下の実際のシステムの説明を理解するための論理が優勢であるべきである。   Intraluminal deployment in one example is performed using a delivery catheter having coaxial inner tubes (plungers) and outer tubes (sheaths) arranged to move axially relative to each other. The stent graft is compressed and placed in front of the inner tube within the distal end of the outer catheter tube. The catheter is then guided and typically routed through a lumen (eg, a vessel) until the end of the catheter (and stent graft) is placed near the intended treatment site. The inner tube is then kept stationary while the outer tube of the delivery catheter is withdrawn. The inner tube prevents the stent graft from moving backwards as the outer tube is withdrawn. When the outer tube is withdrawn, the stent-graft is gradually exposed from the proximal end to the distal end of the stent-graft, and the exposed portion of the stent-graft is at least partly expanded, inside the lumen, eg, a blood vessel It expands in a radial direction so that it substantially conforms to a part of the wall and makes surface contact. Upon deployment, the proximal end of the stent graft is the end closest to the heart and the distal end is the end farthest from the heart. In contrast, it should be noted that the distal end of the catheter is usually coincident with the end furthest from the operator, while the proximal end of the catheter is the end closest to the operator. Depending on the approach location, the description of the stent graft and delivery system may be consistent or vice versa. The logic to understand the actual system description below should prevail.

多くの自己拡張性のステントグラフト展開システムは、外管または鞘が後ろに引かれるときにステントグラフトの近位端を展開させるように形成されている。ステントグラフトの近位端は典型的には、展開の間、ステントグラフトを脈管壁に固定しかつ密閉するように設計される。そのような構成は、配置における誤差の余地をほとんど残さない。なぜならば、最初の展開後にステントグラフトを再配置することは、最小限に引きおろす引き込みを除いて、可能であったとしても通常は困難であるからである。最初にステントグラフトの近位端を展開することは、ステントグラフトの正確な前展開配置を危険なものにする。   Many self-expanding stent graft deployment systems are configured to deploy the proximal end of the stent graft when the outer tube or sheath is pulled back. The proximal end of the stent graft is typically designed to secure and seal the stent graft to the vessel wall during deployment. Such a configuration leaves little room for error in placement. This is because it is usually difficult, if possible, to reposition the stent graft after initial deployment, with the exception of minimal pull-down. Deploying the proximal end of the stent graft first compromises the exact pre-deployment placement of the stent graft.

この問題を克服するためのW.L. Goreによる1つの試みは、可撓性ジャケットの縦軸に沿ってジャケットを開くリップコードによってステントグラフトを展開する可撓性ジャケットを利用した。例えば、米国特許第6,315,792号。不幸なことに、この方法は、大腿部動脈へのシステムに別個の一体化されていない鞘を導入し、さらに展開中に所望の制御を付与し損なった。ステントグラフトの近位端を制限するために他のステントグラフトデリバリーシステムも試みられたが、それらは一般に、ステントグラフトの最初の展開およびステントグラフトの再展開(ステントグラフトがいったん部分的に展開されている)の両方におけるステントグラフトの配置の操作において充分な制御を付与しない。既存のシステム、特に、展開の際(または鞘を取り除く際)にステントグラフトの遠位端を固定させるシステム、に伴う別の問題は、鞘が引っ込められるとき、ステントグラフトを軸方向に圧縮させ、または一まとまりにさせ得る摩擦力である。この一まとまりになることは、鞘内のステントグラフトの密度を増加させ、そして展開の間に受ける摩擦牽引をさらに増加させ得る。すなわち、ステントグラフトの近位端を束縛することことによって、ステントグラフトの種々の大きさでの再展開を可能にするのに十分な制御を付与し、さらに、ステントグラフトの前進の間の展開力を低下させながら、ステントグラフトの部分的な展開を可能にする方法および展開システムが望まれる。   One attempt by W.L. Gore to overcome this problem utilized a flexible jacket that deploys the stent graft with a lip cord that opens the jacket along the longitudinal axis of the flexible jacket. For example, US Pat. No. 6,315,792. Unfortunately, this method introduced a separate, unintegrated sheath into the system for the femoral artery and failed to give the desired control during deployment. Other stent-graft delivery systems have also been attempted to limit the proximal end of the stent-graft, but they are generally both at the initial deployment of the stent-graft and at the re-deployment of the stent-graft (once the stent-graft has been partially deployed) It does not give sufficient control in the operation of stent graft placement. Another problem with existing systems, particularly those that secure the distal end of the stent graft during deployment (or removal of the sheath), is that when the sheath is retracted, the stent graft is compressed axially or partially. It is a frictional force that can be united. This unity can increase the density of the stent graft within the sheath and can further increase the frictional traction experienced during deployment. That is, by constraining the proximal end of the stent graft, it provides sufficient control to allow re-deployment of the stent graft at various sizes, and further reduces the deployment force during advancement of the stent graft. However, methods and deployment systems that allow partial deployment of stent grafts are desired.

本発明に従う第一の局面では、制御されたステントグラフト展開デリバリーシステムが、ステントグラフト、ステントグラフトを直径が束縛された構成で含む引き込み可能な第一鞘、引き込み可能な第一鞘内のかつステントグラフト内の外管、および外管内の内管を含み、ここで、内管および外管は共に、引き込み可能な第一鞘に対しておよび互いに対して軸方向に移動する。上記システムはさらに、内管の遠位端に結合され、かつステントグラフトのA方向端(以降、近位端と言うことがある)の少なくとも一部を半径方向に圧縮された構成で保持するように構成されたキャップを含む。ここで、デリバリーシステムの遠位端はオペレーターから最も遠い端であり、ステントグラフトのA方向とは、デリバリーシステムの遠位端と係合するステントグラフトの端の方向を言う。外管と内管との間の制御された相対的な軸方向の移動は、ステントグラフトのA方向端をキャップからおよび半径方向に圧縮された構成から解放する。
In a first aspect according to the present invention, a controlled stent-graft deployment delivery system, the stent graft, the first sheath retractable including a configuration in which diameter is constrained stent graft, the first intrathecal retractable and in graft Including an outer tube and an inner tube within the outer tube, wherein the inner tube and the outer tube both move axially relative to the retractable first sheath and relative to each other. The system is further coupled to the distal end of the inner tube and holds at least a portion of the stent graft A-direction end (hereinafter sometimes referred to as the proximal end ) in a radially compressed configuration. Includes a configured cap. Here, the distal end of the delivery system is the end farthest from the operator, and the A direction of the stent graft refers to the direction of the end of the stent graft that engages the distal end of the delivery system. Controlled relative axial movement between the outer tube and the inner tube releases the A-direction end of the stent graft from the cap and from the radially compressed configuration.

制御されたステントグラフト展開デリバリーシステムは、内管の遠位端で結合された、可撓性の先細先端におけるシュラウドの部分から形成されたキャップを有し、さらに内管に結合されたねじ込みカラー(threaded collar)および、ステントグラフトの制御された展開のために内管と外管との間の相対的な軸方向の移動を可能にする、外管に結合された噛み合いねじ込みシャフト(mating threaded shaft)を含み得る。上記システムはさらに、外管に取り付けられたロック(近位ロックと言うことがある)を含み得、ここで、ステントグラフトは、ステントグラフトのA方向端に、ジグザグ形状の半径方向に拡張するばね(近位ばねと言うことがある)を有する。一端におけるばねの頂点は、半径方向に圧縮された構成でロックに引っ掛けられたままであり、一方、上記ばねの端は、キャップ内に捕獲されたままである。ロックはさらに、ステントグラフトのばねの上記複数の頂点を保持するために、複数のリブまたはスプラインを含み得る。
Controlled stent graft deployment delivery system, coupled with the distal end of the inner tube, put the tapered tip of the flexible and cap formed from a portion of Resid Yurau de, coupled to the inner tube further A threaded collar and a mating threaded shaft coupled to the outer tube that allows relative axial movement between the inner and outer tubes for controlled deployment of the stent graft shaft). The system may further include a lock ( sometimes referred to as a proximal lock ) attached to the outer tube, where the stent-graft is a zigzag radially expanding spring ( nearly ) at the A-direction end of the stent-graft. Sometimes referred to as a spring. Apex of the spring at one end remains hooked to the structure Delo click that is radially compressed, whereas the end of the spring remains trapped in the cap. Lock further to hold the plurality of vertices of I field of the stent graft may include a plurality of ribs or splines.

本発明の第2の局面では、制御されたステントグラフト展開デリバリーシステムが、引き込み可能な第一鞘、引き込み可能な第一鞘内の外管、外管に対して軸方向に移動し得る、外管内の内管、および内管の遠位端に結合されたキャップを含む。上記システムはさらに、ステントグラフトの近位端を、キャップ内のままでありながら、直径が束縛された構成で保持する一方で、ステントグラフトの軸方向および半径方向の移動をなおも可能にするための、外管に取り付けられた保持機構を含み得る。
本発明の第三の局面では、ステントグラフトの制御された展開のための方法が、ステントグラフトの残りの部分を部分的に展開しながら、ステントグラフトの近位端をキャップ下で半径方向に束縛する工程、上記の残りの部分の部分的な展開の後にステントグラフトの軸方向および半径方向の位置の少なくとも1を必要に応じて評価し、調節する工程、およびキャップと、ステントグラフトをキャップ内に保持する管との間の最小限の制御された共軸移動によってステントグラフトの近位領域を開放する工程を含む。
In a second aspect of the present invention, a controlled stent graft deployment delivery system includes a retractable first sheath, an outer tube within the retractable first sheath, and an inner tube that can move axially relative to the outer tube. An inner tube and a cap coupled to the distal end of the inner tube. The system further provides for maintaining the proximal end of the stent graft in a diameter constrained configuration while remaining within the cap, while still allowing axial and radial movement of the stent graft. A holding mechanism attached to the outer tube may be included.
In a third aspect of the present invention, a method for controlled deployment of a stent graft comprises radially constraining the proximal end of the stent graft under the cap while partially deploying the remaining portion of the stent graft. Optionally assessing and adjusting at least one of the axial and radial positions of the stent graft after partial deployment of the remaining portion, and a cap and a tube holding the stent graft within the cap. Opening the proximal region of the stent graft with minimal controlled coaxial movement therebetween.

図1〜4は、ステントグラフト展開デリバリーシステム10の一部を示す。垂直の破線は、デリバリーシステムの要素が操作されてステントグラフト30の近位端を最初に部分的に展開し、次いで完全に展開するときのステントグラフトの末端ばねの位置に関する共通の位置に対するそれらの図の間の相関関係を示すための参照線である。   1-4 illustrate a portion of a stent graft deployment delivery system 10. The vertical dashed line is a view of those views relative to a common position relative to the position of the end spring of the stent graft when the delivery system elements are manipulated to first partially deploy the proximal end of the stent graft 30 and then fully deploy. It is a reference line for showing the correlation between.

図1は、ステントグラフトを有しない、デリバリーシステム10のみの遠位先細先端部分を示す。一方、図2〜4は、ステントグラフト30が入れられた、展開デリバリーシステム先端部分の詳細図を示し、図の進行とともに、引き込み可能な第一鞘40内からの展開を示す。このシステムは、ステントのみまたは何らかの他の形態の内部補綴を展開することもできる。本明細書において「ステントグラフト」の以降の使用は、他の形態の内部補綴を包含すると理解されるべきである。   FIG. 1 shows a distal tapered tip portion of a delivery system 10 only without a stent graft. 2-4 show a detailed view of the distal end of the deployment delivery system with the stent graft 30 in place, and show the deployment from within the retractable first sheath 40 as the diagram progresses. The system can also deploy a stent alone or some other form of endoprosthesis. Subsequent use of “stent graft” herein should be understood to encompass other forms of endoprosthesis.

ステントグラフト展開システム10の構成は、可撓性でありかつ隙間なくそして曲がりくねった脈管の中を進むことを可能にすることができる先細先端12を含む。先細先端12は、例えば案内ワイヤの通行を可能にする内腔14を含み得る。他の先端形状、例えば弾丸状の先端も使用され得る。   The configuration of the stent graft deployment system 10 includes a tapered tip 12 that is flexible and can be advanced without gaps and tortuous vessels. The tapered tip 12 may include a lumen 14 that allows passage of a guide wire, for example. Other tip shapes may also be used, for example a bullet tip.

引きこまれていない位置にある引き込み可能な第一鞘40(好ましくは、半剛性物質、例えばPTFE、で作られる)は、図2に示されるように、ステントグラフト30を第一の、直径が束縛された構成で含む。外管18が、図1および4に示されるように、引き込み可能な第一鞘40内のかつステントグラフト30内に配置される。外管18内の内管20は、案内ワイヤ内腔として作用する。内管20および外管18は、相互に縦軸に沿って移動し、また、引き込み可能な第一鞘と相対的に縦軸に沿って移動し得る。キャップ15が、内管20の遠位領域または端部分11に結合されており、さらに、ステントグラフト30の近位端の少なくとも一部を半径方向に圧縮された構成で保持するように形成されている。カテーテルのオペレーター側の端部の作動部材が、軸方向の相対的な力を生じて、外管18と内管20との間の制御された相対的な軸方向の移動を提供し、その結果、ステントグラフトの近位端(例えば、近位ばね)のキャップからのおよび半径方向に圧縮された構成からの解放を正確に制御する。   A retractable first sheath 40 (preferably made of a semi-rigid material, such as PTFE) in an unretracted position provides the stent graft 30 with a first, diameter-constrained, as shown in FIG. Included in the configuration. Outer tube 18 is positioned within retractable first sheath 40 and within stent graft 30 as shown in FIGS. The inner tube 20 in the outer tube 18 acts as a guide wire lumen. Inner tube 20 and outer tube 18 may move along the longitudinal axis relative to each other and may move along the longitudinal axis relative to the retractable first sheath. A cap 15 is coupled to the distal region or end portion 11 of the inner tube 20 and is further configured to hold at least a portion of the proximal end of the stent graft 30 in a radially compressed configuration. . An actuating member at the operator end of the catheter creates an axial relative force to provide controlled relative axial movement between the outer tube 18 and the inner tube 20, and as a result. Precisely control the release of the proximal end (eg, proximal spring) of the stent graft from the cap and from the radially compressed configuration.

図2は、デリバリーシステムに入れられたステントグラフト30を有するシステム10を示す。ステントグラフトは、展開前の引きこまれていない位置にある引き込み可能な第一鞘40内に置かれている。   FIG. 2 shows system 10 with stent graft 30 encased in a delivery system. The stent graft is placed in a retractable first sheath 40 in an unretracted position prior to deployment.

図3は、部分的に引きこまれた鞘40を有するシステム10を示す。ステントグラフト30の近位端(先端)が束縛され、一方、鞘40の端部と束縛された近位端(先端)との間のステントグラフト30の近位部分(それは今、鞘40の部分的な引き込み故に暴露されている)は部分的に展開されており、そのことが、近位端の開放前のステントグラフトの軸方向の再配置を可能にし(ステントグラフトの近位端の開放は、ステントグラフトの近位端に向かう方向でのステントグラフトの再配置を防止する)、一方、拡張および、ステントグラフトとステントグラフトが展開されているところの脈管壁との間の接触の程度に応じて、ステントグラフトの何らかの引き下ろし(ステントグラフトの遠位端に向かう移動)が可能である。   FIG. 3 shows the system 10 having a partially retracted sheath 40. The proximal end (tip) of the stent graft 30 is constrained, while the proximal portion of the stent graft 30 between the end of the sheath 40 and the constrained proximal end (tip) is now part of the sheath 40. Has been partially deployed, which allows for axial repositioning of the stent graft prior to opening of the proximal end (opening of the proximal end of the stent graft is proximate to the stent graft). Depending on the degree of expansion and contact between the stent graft and the vessel wall where the stent graft is deployed (sometimes withdrawing the stent graft) Movement toward the distal end of the stent graft).

図3Aは、図3に示されるステントグラフト展開状態と一致した、選択された部分的図模式図である。ここでは、明瞭にするために、カテーテルの遠位端および保持シャフトが含まれていない。図3Aにおいて、鞘はさらに遠くに引きこまれているように見え、サイズ比は、図3と完全には一致していないが、にもかかわらず、図式的に一致している。この図において、ステントグラフトの展開は停止され得、そして、ステントグラフトが、脈管壁を損傷する実質的な危険を伴うことなく軸方向に何れの方向にも再配置され、回転されまたは移動され得ることが分かる。   3A is a selected partial schematic diagram consistent with the stent-graft deployment state shown in FIG. Here, for clarity, the distal end of the catheter and the retention shaft are not included. In FIG. 3A, the sheath appears to be retracted further, and the size ratio is not completely consistent with FIG. 3, but is nevertheless graphically consistent. In this figure, the deployment of the stent graft can be stopped and the stent graft can be repositioned, rotated or moved axially in either direction without substantial risk of damaging the vessel wall. I understand.

図4には、内管20と外管18との間の制御された相対的な軸方向の移動によって展開された、ステントグラフト30の近位端が示されている。特に、図1〜4に示されているように、ステントグラフトの末端ばねの近位頂点を含む末端キャップ15は、外管18の遠位端に結合された、先細先端12のシュラウド部分から形成され得る。シュラウド部分(先細先端12の管状本体部分16によって形成される)内には好ましくは、ステントグラフト30のための近位停止として作用する、外管18の遠位部分または遠位端に結合された後ろ板17が存する。シュラウド部分の管状本体部分16は、キャップに追加の剛性を付与するために先細先端12の近位端付近に支持(強化)環13をも含み得、そして、好ましくはプラスチック物質で作られたキャップシュラウド部分16の直径が伸長する(または歪む)のを防ぐ。それによって、この構成は、キャップによって束縛されたステントグラフトの近位端の早期解放を防ぐ(早期伸長は、ステントグラフトの拘束された部材が緩むのに充分大きい間隙を生じ得る)。さらに、近位ロック(保持器)22も、外管18の遠位部分に結合されている。近位ロック22は好ましくは、シュラウド部分16と共に、末端ステントグラフト30のための軸方向の拘束として作用し得る少なくとも1のまたは複数のリブ(またはスプライン)を含む。ステントグラフト30の近位端(または近位ばね31、32および33)は、近位ロックのリブの近位端が先端のシュラウド部分16の末端を通過するまで、展開することができない。   FIG. 4 shows the proximal end of stent graft 30 deployed by controlled relative axial movement between inner tube 20 and outer tube 18. In particular, as shown in FIGS. 1-4, the end cap 15 including the proximal apex of the stent graft end spring is formed from a shroud portion of the tapered tip 12 coupled to the distal end of the outer tube 18. obtain. Within the shroud portion (formed by the tubular body portion 16 of the tapered tip 12), preferably the back portion coupled to the distal portion or distal end of the outer tube 18 that acts as a proximal stop for the stent graft 30. There is a plate 17. The tubular body portion 16 of the shroud portion may also include a support (reinforcement) ring 13 near the proximal end of the tapered tip 12 to provide additional rigidity to the cap, and preferably a cap made of plastic material. Prevents the diameter of the shroud portion 16 from extending (or distorting). This configuration thereby prevents premature release of the proximal end of the stent graft constrained by the cap (premature extension can create a gap large enough for the constrained member of the stent graft to loosen). In addition, a proximal lock (retainer) 22 is also coupled to the distal portion of the outer tube 18. Proximal lock 22 preferably includes, together with shroud portion 16, at least one or more ribs (or splines) that can act as an axial constraint for distal stent graft 30. The proximal end (or proximal springs 31, 32 and 33) of the stent graft 30 cannot be deployed until the proximal end of the proximal lock rib passes the end of the tip shroud portion 16.

ステントグラフトは、ポリエステルの縫糸を使用してNitinol支持構造物35に縫い付けられたポリエステルまたはDacron物質(グラフト物質34(図3B)を形成する)を含み得る。一例では、ステントグラフトに支持、強度および安定性を付与する骨格構造物35を形成するために、Nitinolワイヤが使用される。また、ステントグラフトは、大部分がグラフト物質によって覆われていないままであるところのステントグラフトの近位端上に支持部材(クラウンステントまたはばね36)をも有し得る。覆われていない部分は、典型的には、所定数の頂点が突き出たジグザグ様パターンを有する。頂点は、ステントグラフトの近位ばね(またはクラウンばね36)として知られるものの最先端を形成する。   The stent graft may include polyester or Dacron material (forming graft material 34 (FIG. 3B)) sewn to Nitinol support structure 35 using polyester sutures. In one example, Nitinol wire is used to form a skeletal structure 35 that provides support, strength, and stability to the stent graft. The stent graft may also have a support member (crown stent or spring 36) on the proximal end of the stent graft that remains largely uncovered by the graft material. The uncovered portion typically has a zigzag-like pattern with a predetermined number of vertices protruding. The apex forms the leading edge of what is known as the proximal spring (or crown spring 36) of the stent graft.

図1〜3に示されるように、後ろ板17と近位ロック22との間の間隙19は好ましくは、近位ばねの突き出た頂点を保持するように設計される。頂点は、近位ロック22のリブ23にまたがり、そして外管18と内管20との間の相対的な移動が間隙19を暴露し、図4に示されるように近位ばねの頂点31〜33を解放するまで、後ろ板と近位ロックとの間にトラップされたままである。言い換えると、頂点31〜33は、頂点がシュラウド部分15内に留まっている間は、近位ロック22上のリブ23から解放され得ない。内管20および先細先端12アッセンブリが前進して近位ロック22を暴露するとき、近位ばねの頂点は、近位ロック22の夫々のリブ23から解放される。解放の結果、図4に示されるように、ステントグラフト30の近位端の展開を生じる。なお、近位ばねの頂点が間隙19の中およびキャップ内または先細先端12のシュラウド部分内に留まっている間、近位ばねの全体は、軸方向(縦方向)に束縛されるとともに、半径方向にも束縛されたままである。支持環13は、通常は金属で作られており、近位ばねの半径方向の力が先細先端および特に先細先端のシュラウド部分の形状を歪ませるのを防ぐことを助ける。   1-3, the gap 19 between the back plate 17 and the proximal lock 22 is preferably designed to hold the protruding apex of the proximal spring. The apex spans the ribs 23 of the proximal lock 22 and the relative movement between the outer tube 18 and the inner tube 20 exposes the gap 19 and the apex 31-1 of the proximal spring as shown in FIG. It remains trapped between the backplate and the proximal lock until 33 is released. In other words, the vertices 31-33 cannot be released from the ribs 23 on the proximal lock 22 while the vertices remain in the shroud portion 15. As the inner tube 20 and the tapered tip 12 assembly are advanced to expose the proximal lock 22, the apex of the proximal spring is released from the respective rib 23 of the proximal lock 22. The release results in the deployment of the proximal end of the stent graft 30 as shown in FIG. It should be noted that while the apex of the proximal spring remains in the gap 19 and within the cap or shroud portion of the tapered tip 12, the entire proximal spring is constrained in the axial direction (longitudinal direction) and radially It remains bound. The support ring 13 is usually made of metal and helps to prevent the radial force of the proximal spring from distorting the shape of the tapered tip and in particular the shroud portion of the tapered tip.

別のステントグラフト展開デリバリーシステム50の詳細図式平面図を図5および6に示す。図5は、キャップ内または先端52のシュラウド部分55内に束縛されたステントグラフト63の複数の近位ばね頂点65、67および69(68は、この図では隠れている)を示す。キャップまたはシュラウド部分55は、支持環56をさらに含み得る管部分54から形成され得る。   Detailed schematic plan views of another stent graft deployment delivery system 50 are shown in FIGS. FIG. 5 shows a plurality of proximal spring vertices 65, 67 and 69 (68 are hidden in this view) of the stent graft 63 constrained within the cap or within the shroud portion 55 of the tip 52. The cap or shroud portion 55 can be formed from a tube portion 54 that can further include a support ring 56.

図5Aは、内管アッセンブリの近位ロック留め金64と係合した後ろ板57を示す。近位ロック留め金64は、後ろ板57の端にかかるプレートまたはバーであり、後ろ板57中のスロットまたは溝を受け入れる係合フックと係合するための2つの係合フックを有する。これらのスロットまたは溝の2つのオフセット部分断面図を、図5Aに示される後ろ板57の右および左側に見ることができる。左側は、スロットに係合されかつスロットリップによって解放を防止された、ロック留め金64からの左側突起を示し、一方、右側は、スロットまたは溝が開いておりかつスロットリップがないところの角張ったオフセット断面(左側と全く正反対ではない)を示す。後ろ板との係合からの留め金64の解放は、下記の図7に一層精密に描かれているように、溝と類似の斜め形状のスロットを有することにより回転運動によって行われ得る。あるいは、内管と外管との間の相対的な回転運動を開始することによって行われ得る。図に示される比率は、図7に示される種の配置と一致していないが、当業者は、図5、5Aおよび6に示された部材の図式的性質を認識し、そして、図7に関して示され、論じられているように、内管と外管との間の機能的な係合および解放作用を含むように比率が変更され得ることを理解するであろう。   FIG. 5A shows the back plate 57 engaged with the proximal lock clasp 64 of the inner tube assembly. The proximal lock clasp 64 is a plate or bar over the end of the back plate 57 and has two engagement hooks for engaging with an engagement hook that receives a slot or groove in the back plate 57. Two offset partial cross-sectional views of these slots or grooves can be seen on the right and left side of the backplate 57 shown in FIG. 5A. The left side shows the left protrusion from the lock clasp 64 engaged with the slot and prevented from being released by the slot lip, while the right side is angular with the slot or groove open and without the slot lip. An offset cross section (not exactly opposite to the left side) is shown. Release of the clasp 64 from engagement with the backplate can be accomplished by rotational movement by having a slot with an oblique shape similar to the groove, as depicted more precisely in FIG. 7 below. Alternatively, it can be done by initiating a relative rotational movement between the inner and outer tubes. The proportions shown in the figure are not consistent with the species arrangement shown in FIG. 7, but one skilled in the art will recognize the schematic nature of the members shown in FIGS. 5, 5A and 6, and with reference to FIG. As will be shown and discussed, it will be understood that the ratio can be varied to include a functional engagement and release action between the inner and outer tubes.

図6は、キャップ下から解放された複数の近位ばね頂点65、67、69および68を有するステントグラフト展開デリバリーシステム50の別の詳細図を示す。図1〜4に記載されたシステム10におけるように、ステントグラフト展開デリバリーシステム50は、後ろ板57および、複数のリブ61を有する近位ロック62の両方に結合された外管60、先端52に結合された内管59(外管60内)、および先端52に連結された近位ロック留め金64を含む。内管59およびそれが固定されるところの先端52が前進して近位ロック62を暴露すると、近位ばねの頂点65、67、69および68が、近位ロック62の夫々のリブ(例えば、61)から解放される。解放の結果、図6に示されるように、ステントグラフト63の近位端の展開を生じる。   FIG. 6 shows another detailed view of a stent graft deployment delivery system 50 having a plurality of proximal spring vertices 65, 67, 69 and 68 released from under the cap. As in the system 10 described in FIGS. 1-4, the stent graft deployment delivery system 50 is coupled to an outer tube 60, a tip 52, which is coupled to both a back plate 57 and a proximal lock 62 having a plurality of ribs 61. And a proximal lock clasp 64 connected to the tip 52. As the inner tube 59 and the tip 52 to which it is secured are advanced to expose the proximal lock 62, the apex 65, 67, 69 and 68 of the proximal spring causes the respective ribs (eg, 61). The release results in the deployment of the proximal end of the stent graft 63 as shown in FIG.

近位ばねの頂点65、67、69および68が後ろ板と近位ロックとの間の間隙におよびキャップ内または先細先端52のシュラウド部分内に保持されている間、近位ばねの全体は、軸方向に束縛されると共に、半径方向にも束縛されたままである。支持環56は、先に説明したように、近位ばねの半径方向の力が先端および特に先端のシュラウド部分の形状を歪ませるのを防ぐことを助ける。   While the proximal spring apexes 65, 67, 69 and 68 are held in the gap between the backplate and the proximal lock and in the cap or the shroud portion of the tapered tip 52, the entire proximal spring is In addition to being constrained in the axial direction, it remains constrained in the radial direction. The support ring 56 helps to prevent the radial force of the proximal spring from distorting the shape of the tip and particularly the shroud portion of the tip, as previously described.

次に図7を参照すると、外管74内の内管72、近位ロック75、後ろ板78および近位ロック留め金80を含む近位ロックアッセンブリ70の透視図が示されている。内管72は、内管72の遠位端で近位ロック留め金80に取り付けられている。近位ロック留め金80は、先に図5および6に図式的に示したように、ステントグラフトデリバリーシステムの先端に連結され得る。内管72はさらに、案内ワイヤ(図示していない)内腔として作用する。後ろ板78は、外管74の遠位端で取りつけられており、近位ロック75は、示されているように、外管74の遠位端付近に取りつけられている。後ろ板78は、ステントグラフト(図示していない)のための近位停止として作用し(シュラウド(キャップ)が前進して近位ばねの頂点を開放するとき、ステントグラフトがシュラウドおよび先端アッセンブリと共に移動するのを防ぐ)、好ましくは、少なくとも1の溝79を含む。近位ロック留め金80は、後ろ板78の溝79に乗る少なくとも1の支柱(post)82(ステントグラフトおよびカテーテルの縦軸に関して斜角に置かれ、溝(スロット)は近位端で閉じられ、反対の端で開かれている)を含み得る。この配置によって、近位ロック75は、支柱(例えば82)の端が溝79の端から除かれるように支柱82が遠位に移動され、そして溝79の端を通過して近位ロック75に相対的な先端の近位運動をもはや防がなくなるまで、先端(および留め金80)から分離され得ない。留め金80を解放するために、近位ロック75および先端(または留め金80)は、互いに押しつけられ(または圧縮され)なければならず(作動機構は実際には、正常な展開のために使用される運動と反対の方向に移動され(変えられ)なければならない)、それは、正常な展開運動の際に付与される力(分離力)と反対である。通過は、支柱82が後ろ板中の溝から外へ押しやられ、後ろ板78中の溝79から完全に分離する(または外れる)ように外管に対して軸方向に内管72を引っ張る(下記で述べるカテーテルのねじ込み展開相対運動機構を使用する)ことによって行われる。使用者がいったん、先端(または留め金80)および近位ロック75を圧縮して留め金80を後ろ板78から解放すると、近位ロックが先端のシュラウド部分から外へ進められ得る。内管72と外管74(およびそれらに夫々取り付けられたアッセンブリ70の夫々の構成要素)との相互共軸運動を作動させるための遠位機構は、図8および9の説明によって明らかになるであろう。そのようなアッセンブリは、早期の展開を防ぎ、ステントグラフトの故意でない展開の可能性を減少させる。この配置はまた、早期展開を引き起こし得るところの追跡および/または展開中に展開システムが受け得る何れの延伸力をも防ぐ。   Referring now to FIG. 7, a perspective view of the proximal lock assembly 70 including the inner tube 72 within the outer tube 74, the proximal lock 75, the back plate 78 and the proximal lock clasp 80 is shown. Inner tube 72 is attached to proximal lock clasp 80 at the distal end of inner tube 72. Proximal lock clasp 80 may be coupled to the distal end of the stent graft delivery system, as shown schematically in FIGS. 5 and 6 above. Inner tube 72 further acts as a guide wire (not shown) lumen. The back plate 78 is attached at the distal end of the outer tube 74 and the proximal lock 75 is attached near the distal end of the outer tube 74 as shown. The back plate 78 acts as a proximal stop for the stent graft (not shown) (when the shroud (cap) is advanced to open the apex of the proximal spring, the stent graft moves with the shroud and tip assembly). Preferably, at least one groove 79 is included. Proximal lock clasp 80 is positioned at an oblique angle with respect to the longitudinal axis of the stent graft and catheter, with the groove (slot) closed at the proximal end, which rides in groove 79 of backplate 78. Open at the opposite end). This arrangement causes the proximal lock 75 to move the strut 82 distally so that the end of the strut (eg 82) is removed from the end of the groove 79 and pass through the end of the groove 79 to the proximal lock 75. It cannot be separated from the tip (and clasp 80) until it no longer prevents relative tip proximal movement. In order to release the clasp 80, the proximal lock 75 and the tip (or clasp 80) must be pressed (or compressed) together (actuating mechanism is actually used for normal deployment) Must be moved (changed) in the opposite direction to the motion being performed), which is the opposite of the force applied during normal deployment motion (separation force). The passage pulls the inner tube 72 axially relative to the outer tube so that the post 82 is pushed out of the groove in the back plate and completely separated (or detached) from the groove 79 in the back plate 78 (see below). Using the screw-deployment relative motion mechanism of the catheter described in the above. Once the user compresses the tip (or clasp 80) and proximal lock 75 to release the clasp 80 from the backplate 78, the proximal lock can be advanced out of the shroud portion of the tip. The distal mechanism for actuating the mutual co-axial movement of the inner tube 72 and the outer tube 74 (and the respective components of the assembly 70 attached thereto) will become apparent from the description of FIGS. I will. Such an assembly prevents premature deployment and reduces the possibility of unintentional deployment of the stent graft. This arrangement also prevents any stretching forces that the deployment system can experience during tracking and / or deployment that can cause premature deployment.

近位ロック75は好ましくは、近位ロック75の周辺に多数の、輪郭に沿ったリブ76を含む。リブの数は、理想的には、ステントグラフト(図示していない)の近位ばね中の頂点の数に依存するが、本発明は、必ずしもそれに限定されない。リブ76が輪郭に沿うことは、近位ロック上に近位ばねの頂点を置くことを助ける(円筒形状に固定されて束縛された近位端ばねが輪郭の細い直径端上に取り付けられ、次いで輪郭に沿った形状の近位ロックが拡張マンドレルとして作用するように広い端に向かって押しやられ得るような斜めの表面を付与して、近位ばねの頂点を広い端を通って押しやり、輪郭に沿ったスプラインの端によって係合されることを可能にすることによる。そのとき、シュラウドは、ステントグラフトの近位ばねの、目下近位ロック係合された頂点の上に導かれる。)。輪郭に沿ったスプラインの広い端はさらに、近位ロックが、図1〜6に関して先に説明されたように、先端のシュラウド部分を通過するところの展開まで、ステントグラフトの近位端のための軸方向の束縛を付与する。内管72と外管74との間の相対的な動きは、ステントグラフトの近位端(近位ばね)の解放を引き起こす。近位ロックの輪郭に沿った表面はまた、ステントグラフトの近位端が解放されそしてステントグラフトが完全に展開された後、外部表面の先細が、カテーテル先端を鞘中に戻して引込めることを容易にするような利点を付与する。輪郭に沿った外部表面は、小さい直径端がいったん鞘の端に近づき始めると、鞘を開いて先端を共軸的に取り囲むための案内として作用し、その結果、先端が鞘内に引き込まれるとき、脈管内部表面への接触および損傷が最小にされる。   The proximal lock 75 preferably includes a number of contoured ribs 76 around the proximal lock 75. The number of ribs ideally depends on the number of vertices in the proximal spring of the stent graft (not shown), but the invention is not necessarily limited thereto. The rib 76 being contoured helps to place the apex of the proximal spring on the proximal lock (the proximal end spring fixed and constrained in a cylindrical shape is mounted on the narrow diameter end of the contour, then Providing a beveled surface so that the contoured proximal lock can be pushed toward the wide end to act as an expansion mandrel, pushing the apex of the proximal spring through the wide end By allowing the shroud to be engaged by the end of the spline along the axis of the proximal spring of the stent-graft proximal spring, which is now over the currently locked apex. The wide end of the spline along the contour further provides an axis for the proximal end of the stent graft until deployment where the proximal lock passes through the shroud portion of the tip as previously described with respect to FIGS. Give direction constraints. The relative movement between the inner tube 72 and the outer tube 74 causes the proximal end (proximal spring) of the stent graft to be released. The surface along the contour of the proximal lock also facilitates the taper of the outer surface to retract the catheter tip back into the sheath after the proximal end of the stent graft is released and the stent graft is fully deployed. To give such an advantage. The contoured outer surface acts as a guide to open the sheath and coaxially surround the tip once the small diameter end begins to approach the end of the sheath so that the tip is retracted into the sheath , Contact and damage to the vascular inner surface is minimized.

次に図8を参照すると、遠位アッセンブリまたは回転カラー作動アッセンブリ100の図式図が示されており、外管(例えば、104)に対する内管(例えば、102)の制御された相対的な軸方向の動きを例示する。アッセンブリ100は好ましくは、内管(例えば、102)に取り付けられたルーア(luer)112およびスピンドル110、外管(例えば、104)に結合されたねじ込みシャフト108およびハンドル114、およびカラー106を含む。カラー106は内管(例えば、102)に取りつけられ得るが、ルーア112に対して回ることもできる。この構成において、内管102は、カラー106をねじ込みシャフト108の下方にまたはねじ込みシャフト108を横切ってねじ込むまたは回転させることによって外管104に関して軸方向に前進し得る。ねじ込みシャフト108は、カテーテルにおいて通常使用されるTouchy Borstコネクターのねじ込み部分と同様であり得る。アッセンブリ100は、展開の際のステントグラフトの近位ばねの頂点を開放する(または活性化する)ための、ねじるまたは回転させることによる簡単な機構を提供する。   Referring now to FIG. 8, a schematic diagram of a distal assembly or rotating collar actuation assembly 100 is shown, with the controlled relative axial orientation of the inner tube (eg, 102) relative to the outer tube (eg, 104). The movement of is illustrated. The assembly 100 preferably includes a luer 112 and spindle 110 attached to an inner tube (eg, 102), a threaded shaft 108 and handle 114 coupled to an outer tube (eg, 104), and a collar 106. The collar 106 can be attached to the inner tube (eg, 102), but can also rotate relative to the luer 112. In this configuration, the inner tube 102 may be advanced axially with respect to the outer tube 104 by screwing or rotating the collar 106 below or across the threaded shaft 108. The threaded shaft 108 can be similar to the threaded portion of a Touchy Borst connector commonly used in catheters. The assembly 100 provides a simple mechanism by twisting or rotating to open (or activate) the apex of the proximal spring of the stent graft during deployment.

管部分954から形成されたキャップまたはシュラウド部分を有する先端952(内管961に結合)、後ろ板957および近位ロック962の両方に結合された外管960、ならびに遠位アッセンブリまたは回転カラー作動アッセンブリを含むステントグラフト展開デリバリーシステム900の図式図が図9に示されている。遠位アッセンブリは、外管960に関する内管961の制御された相対的な軸方向の動きを提供し、好ましくは、ルーア912および、内管961に取り付けられたスピンドル910、外管960に結合されたねじ込みシャフト908、およびカラー906を含む。カラー906は、内管961に取りつけられ得るが、ルーア912に関して回ることもできる。この構成において、内管961は、カラー906をねじ込みシャフト908の下方にまたはねじ込みシャフト908を横切ってねじ込むまたは回転させることによって外管960に関して軸方向に前進し得る。なお、鞘およびステントグラフトは図8および9には示されていない。鞘およびその作動機構およびハンドル(図示していない)は、先に記載したように、ステントグラフト近位ばね頂点作動ハンドル(機構)と、ステントグラフトが展開されるところのカテーテルの先端との間で、内管および外管の周りに置かれる。   Tip 952 (coupled to inner tube 961) having a cap or shroud portion formed from tube portion 954, outer tube 960 coupled to both back plate 957 and proximal lock 962, and distal or rotating collar actuated assembly A schematic diagram of a stent graft deployment delivery system 900 including is shown in FIG. The distal assembly provides controlled relative axial movement of the inner tube 961 relative to the outer tube 960 and is preferably coupled to the luer 912 and the spindle 910 attached to the inner tube 961, the outer tube 960. A threaded shaft 908 and a collar 906. The collar 906 can be attached to the inner tube 961 but can also rotate with respect to the luer 912. In this configuration, the inner tube 961 can be advanced axially with respect to the outer tube 960 by screwing or rotating the collar 906 below or across the threaded shaft 908. Note that the sheath and stent graft are not shown in FIGS. The sheath and its actuation mechanism and handle (not shown), as previously described, are positioned between the stent graft proximal spring apex actuation handle (mechanism) and the tip of the catheter where the stent graft is deployed. Placed around the tube and the outer tube.

例えば腹部大動脈瘤(AAA)を治療するとき、ステントグラフト展開システムまたはデバイスを前進させ、そしてステントグラフト自体を適切に置くときの解剖学的難題がいくつかある。主な難題は、大動脈二又の領域(これは、典型的には、大腿動脈、外腸骨動脈、および総腸骨動脈を含む)において遭遇する。ステントグラフトの遠位端から展開する既存のステントグラフトデリバリーシステムは、ステントグラフトがたとえ部分的であってもいったん展開されると、再配置のための充分な選好を提供しない。ステントグラフトの近位端から展開する既存のステントグラフトデリバリーシステムは、ステントグラフトの近位端の最終的な解放における充分な制御を提供しない。分岐動脈を有するポートの配列(alignment)を必要とするステントグラフトは、本発明の再展開性能および制御された解放機構を大いに有利に利用することができる。本発明のシステムは、ステントグラフトの近位端を半径方向に束縛し、一方、ステントグラフトの中央および/または遠位部分を最初に展開させるので、ステントグラフトは、部分的に展開されたときですら、ステントグラフトが脈管に固定するのを防ぐことによって、軸方向および半径方向の両方で再配置され得る。   For example, when treating an abdominal aortic aneurysm (AAA), there are several anatomical challenges in advancing the stent graft deployment system or device and properly placing the stent graft itself. A major challenge is encountered in the bifurcated region of the aorta, which typically includes the femoral, external iliac, and common iliac arteries. Existing stent graft delivery systems deployed from the distal end of the stent graft do not provide sufficient preference for repositioning once the stent graft is deployed, even if it is partial. Existing stent graft delivery systems that deploy from the proximal end of the stent graft do not provide sufficient control in the final release of the proximal end of the stent graft. Stent grafts that require alignment of ports with bifurcated arteries can take great advantage of the redeployment performance and controlled release mechanism of the present invention. Since the system of the present invention radially constrains the proximal end of the stent graft while first deploying the central and / or distal portion of the stent graft, the stent graft, even when partially deployed, Can be repositioned both axially and radially by preventing anchoring to the vessel.

分岐動脈を有する配列を必要とするステントグラフトは、ステントグラフトの中央またはポート領域を最初に解放させることができる。ステントグラフトは、ステントグラフトの近位端を開放する前に全てのポートが適切に配列されるように再配列され得る。ステントグラフトの近位端は、軸方向にも束縛されており、これは、ステントグラフトがほとんどまたは全く軸方向の支持を有していなくても、完全な展開順序の間、ステントグラフトの位置を保持することをデリバリーシステムに可能にする。本発明は、展開の間、ステントグラフトの近位端を固定し、一方、鞘は抜き出されるので、ステントグラフトと鞘との間の摩擦力が、ステントグラフトを引張負荷下に保持させる。引張負荷下では、ステントグラフトの密度および鞘内の圧縮力が低下される。さらに、本発明の設計を使用すると、ステントグラフト中の支持体(例えば、連結バー)を除去することによって、展開力がさらに低下され得る。なぜならば、そのような支持体は、展開のためにはもはや必要でないからである。   Stent grafts that require an array with bifurcated arteries can first release the center or port area of the stent graft. The stent graft can be rearranged so that all ports are properly aligned before opening the proximal end of the stent graft. The proximal end of the stent graft is also axially constrained, which maintains the position of the stent graft during the complete deployment sequence even though the stent graft has little or no axial support. Enables the delivery system. The present invention secures the proximal end of the stent graft during deployment while the sheath is withdrawn so that the frictional force between the stent graft and the sheath keeps the stent graft under tensile loading. Under tensile loading, the density of the stent graft and the compressive force within the sheath are reduced. Furthermore, using the design of the present invention, deployment force can be further reduced by removing the support (eg, connecting bars) in the stent graft. This is because such a support is no longer necessary for deployment.

さらに、上記したことは、当業者によって理解されるように、単に例示として意図されたものであり、本発明の精神および範囲ならびにその同等物を限定するものではない。   Furthermore, the foregoing is intended as illustrative only, as would be understood by one of ordinary skill in the art, and is not intended to limit the spirit and scope of the invention and its equivalents.

本発明に従う、ステントグラフトおよび外部鞘を有しない、ステントグラフト展開デリバリーシステムの部分断面図である。1 is a partial cross-sectional view of a stent graft deployment delivery system without a stent graft and outer sheath according to the present invention. FIG. 外部鞘内に入れられたステントグラフトを有する、図1の展開デリバリーシステムの詳細図式断面図である。2 is a detailed schematic cross-sectional view of the deployment delivery system of FIG. 1 having a stent graft encased within an outer sheath. FIG. ステントグラフトの近位端が束縛されたままであり、一方ステントグラフトの遠位端はその外部鞘に入れられたままであるときのステントグラフトの近位部分の部分展開を示す、図2の展開デリバリーシステムの詳細図式断面図である。2 is a detailed schematic of the deployment delivery system of FIG. 2 showing partial deployment of the proximal portion of the stent graft when the proximal end of the stent graft remains constrained while the distal end of the stent graft remains encased in its outer sheath. It is sectional drawing. 図3に示されているステントグラフトの部分断面図であるが、図3に示されているカテーテルの遠位端および保持シャフトを有しない。FIG. 4 is a partial cross-sectional view of the stent graft shown in FIG. 3, but without the distal end and retention shaft of the catheter shown in FIG. 図3に示されるデリバリー機構において展開されるべき種類のステントの斜め図である。FIG. 4 is a perspective view of a type of stent to be deployed in the delivery mechanism shown in FIG. 3. ステントグラフトの近位端が展開された、図1のステントグラフト展開デリバリーシステムの部分断面図である。FIG. 2 is a partial cross-sectional view of the stent graft deployment delivery system of FIG. 1 with the proximal end of the stent graft deployed. 近位ばねクラウンがキャップ内に束縛された、別のステントグラフト展開デリバリーシステムの部分断面図である。FIG. 10 is a partial cross-sectional view of another stent graft deployment delivery system with a proximal spring crown constrained within a cap. 図5に示されるステントグラフトデリバリーシステムの端の修正された位置を示す。ここでは、オペレーターがステントグラフトをその意図されるデリバリー箇所に置く前の輸送および運搬の間に早期の解放が生じないように後ろ板と係合した近位ロック留め金が示されている。FIG. 6 shows a modified position of the end of the stent graft delivery system shown in FIG. Here, a proximal locking clasp is shown engaged with the backplate so that premature release does not occur during transport and transport before the operator places the stent graft at its intended delivery site. 複数の近位ばねクラウンがキャップ下から解放された、図5のステントグラフト展開デリバリーシステムを示す。FIG. 6 shows the stent graft deployment delivery system of FIG. 5 with a plurality of proximal spring crowns released from under the cap. ステントグラフト展開デリバリーシステムとともに使用され得る近位ロックサブアッセンブリを示す。FIG. 6 illustrates a proximal lock subassembly that may be used with a stent graft deployment delivery system. ステントグラフト展開デリバリーシステムとともに使用される回転カラー作動アッセンブリを示す断面図式図である。FIG. 3 is a cross-sectional schematic view of a rotating collar actuation assembly used with a stent graft deployment delivery system. 本発明に従うステントグラフト展開デリバリーシステムを示す図式図である。1 is a schematic diagram illustrating a stent graft deployment delivery system according to the present invention. FIG.

符号の説明Explanation of symbols

10 デリバリーシステム
13 支持環
15 キャップ
16 シュラウド部分
17 後ろ板
18
20
22 近位ロック
23 リブ
30 ステントグラフト
40 鞘
64 近位ロック留め金
106 カラー
108 ねじ込みシャフト
110 スピンドル
112 ルーア
114 ハンドル
DESCRIPTION OF SYMBOLS 10 Delivery system 13 Support ring 15 Cap 16 Shroud part 17 Back plate 18 Outer tube 20 Inner tube 22 Proximal lock 23 Rib 30 Stent graft 40 Sheath 64 Proximal lock clasp 106 Collar 108 Screwed shaft 110 Spindle 112 Lure 114 Handle

Claims (15)

デリバリーシステム上で圧縮された自己拡張性ステントグラフト、ここでステントグラフトはA方向端を有し、およびそこから方向に伸長する頂点を有するばねを有する;
該デリバリーシステムの管に固定されたロック、ここで該ロックは突起を有し、該頂点がステントグラフトのA方向端で該突起を越えて伸長する;および
デリバリーシステムの管の遠位端に固定されたシュラウド、ここで、該シュラウドは、ステントグラフトばね頂点の開放が防止されるように、該ばねの頂点のA方向部分の少なくとも一部を該ステントグラフトの半径方向に圧縮された構成で取り囲みかつ突起の半径方向の端に極めて接近して該ばねの頂点のA方向部分の少なくとも一部を取り囲む;
を含む、ここで、デリバリーシステムの遠位端はオペレーターから最も遠い端であり、ステントグラフトのA方向とは、デリバリーシステムの遠位端と係合するステントグラフトの端の方向を言い、外管と管との間の制御された相対的な軸方向の移動が、ステントグラフトのA方向端をシュラウドから開放する
ところの制御されたステントグラフト展開デリバリーシステム。
Self-expanding stent-graft is compressed on the delivery system, wherein the stent graft has an A-direction end, and a Luba roots having a vertex extending therefrom in the direction A;
Lock which is fixed to the outer tube of the delivery system, wherein 該Ro click has a protrusion, the apex is extending beyond the projections at the A side end of the stent graft; and
Shroud that is fixed to the distal end of the inner tube of the delivery system, wherein the shroud, as opening of the stent graft spring vertex is prevented, the stent graft at least a portion of the A direction portion of the apex of the spring enclose takes at least a portion of the surrounding in configurations radially compressed and in close proximity to the radial direction of the end of the projection direction a portion of the apex of the spring free;
Where the distal end of the delivery system is the end furthest from the operator, and the A direction of the stent graft refers to the direction of the end of the stent graft that engages the distal end of the delivery system, the outer tube and the inner Controlled relative axial movement between the tubes releases the A-direction end of the stent graft from the shroud ;
However, a controlled stent graft deployment delivery system.
該ステントグラフトのA方向端で管および管を結合するロック留め金、ここで該結合は最初に係合されており、そしてシュラウドが軸方向に移動してステントグラフトのA方向端を通過するのを防ぐ;
ここで、第一方向での該制御された軸方向の移動が留め金をして管および管の結合を解かせ、一方、該第一方向と反対の第二方向での該制御された軸方向の移動が、該外管および管が結合を解かれた後、シュラウドを移動させてステントグラフトのA方向端を通過させる;
をさらに含む、請求項1記載の制御されたステントグラフト展開デリバリーシステム。
Carlo click clasp to couple the outer tube and the inner tube in the A direction end of the stent graft, the wherein the bond initially are engaged, and the A direction end of the stent graft shroud is moved in the axial direction Prevent passing;
Here, not decoupled of the outer tube and the inner tube and the controlled axial movement clasp in the first direction, whereas, the said control in the second direction opposite the first direction and axial movement, after the outer tube and the inner tube is decoupled, thereby moving the shroud to pass the a direction end of the stent graft;
The controlled stent graft deployment delivery system of claim 1 further comprising:
該制御された軸方向の移動が、該デリバリーシステムのハンドル端で管と管との間のねじ込み係合によって引き起こされる、請求項2記載の制御されたステントグラフト展開デリバリーシステム。The controlled stent graft deployment delivery system of claim 2, wherein the controlled axial movement is caused by a threaded engagement between an outer tube and an inner tube at a handle end of the delivery system. 請求項1記載の制御されたステントグラフト展開デリバリーシステムにおいて、
該ステントグラフトを直径が束縛された構成で含む引き込み可能な第一鞘をさらに含み、
管が該引き込み可能な第一鞘内にありかつステントグラフト内あり;
管が該外管内あり、ここで、内管および外管は共に、引き込み可能な第一鞘に対しておよび互いに対して軸方向に移動し得る;
キャップが内管の遠位端に結合されかつステントグラフトのA方向部分の少なくとも一部を半径方向に圧縮された構成で保持するように構成されており、ここで、外管と内管との間の制御された相対的な軸方向の動きが、ステントグラフトのA方向端をキャップからおよび半径方向に圧縮された構成から開放する;および
該キャップが、内管の遠位端に固定された、可撓性の先細先端の該シュラウドの部分である、
ところの前記デリバリーシステム。
The controlled stent graft deployment delivery system of claim 1.
Further comprising a first sheath retractable containing the stent graft in a configuration diameter is constrained,
The outer tube Yes Yes and within the stent graft in the first intrathecal retractable said;
The inner tube is in the outer tube, wherein the inner and outer tubes together, may move axially relative to and to one another with respect to the first sheath retractable;
A cap is coupled to the distal end of the inner tube and is configured to hold at least a portion of the A-direction portion of the stent graft in a radially compressed configuration, wherein the cap is disposed between the outer tube and the inner tube. Controlled relative axial movement releases the A-direction end of the stent graft from the cap and from the radially compressed configuration; and the cap is secured to the distal end of the inner tube. A portion of the shroud of a flexible tapered tip;
However, the delivery system.
内管に結合されたねじ込みカラーおよび外管に結合された噛み合いねじ込みシャフトが、ステントグラフトの制御された展開のための、内管と外管との間の相対的な軸方向の動きを可能にする、請求項4記載の制御されたステントグラフト展開デリバリーシステム。A threaded collar coupled to the inner tube and a mating threaded shaft coupled to the outer tube allow for relative axial movement between the inner and outer tubes for controlled deployment of the stent graft. 5. The controlled stent graft deployment delivery system of claim 4. 該ロックが外管に取り付けられており、ここで、ステントグラフトが複数のばね頂点をステントグラフトのA方向端に有し、一方、該複数のばね頂点はキャップ内に留まりながら、半径方向に圧縮された構成でロック上に引っ掛けられたままである、請求項4記載の制御されたステントグラフト展開デリバリーシステム。 該Ro and click is attached to the outer tube, wherein the stent graft has a vertex ne plurality of fly A direction end of the stent graft, while the spring apex of said plurality of while remaining within the cap, radially it remains hooked on the compressed configuration dello click, controlled stent graft deployment delivery system according to claim 4, wherein. ックが、ステントグラフトのばねの複数の頂点を保持するための複数のリブをさらに含む、請求項6記載の制御されたステントグラフト展開デリバリーシステム。 Lock further comprises a controlled stent-graft deployment delivery system of claim 6 a plurality of ribs for holding a plurality of vertices of I field of the stent graft. ステントグラフトの展開後にロックを引き込み可能な第一鞘に再導入するプロセスを助けるために、該複数のリブが各々先細になっている、請求項7記載の制御されたステントグラフト展開デリバリーシステム。To help the process of re-introduced into the first sheath retractable to lock after deployment of the stent graft, the ribs of said plurality of tapers respectively, controlled stent graft deployment delivery system according to claim 7 wherein. 請求項1記載の制御されたステントグラフト展開デリバリーシステムにおいて、
引き込み可能な第一鞘をさらに含み、
管が該引き込み可能な第一鞘内にあり;
管が該外管内あり、ここで、内管は外管に対して軸方向に移動し得る;
シュラウドが、該内管の遠位端に軸方向に固定されたキャップを含み;および
該ロックが、ステントグラフトのA方向端が、ステントグラフトの軸方向および半径方向の移動をなおも可能にしながらなおもキャップ内に位置しながら、ステントグラフトのA方向端を直径が束縛された構成で保持するための、外管に取り付けられた保持機構の部分である;
ところの前記デリバリーシステム。
The controlled stent graft deployment delivery system of claim 1.
Further including a retractable first sheath;
The outer tube is located within the first sheath retractable said;
There the inner tube within the outer tube, wherein the inner tube may move axially relative to the outer tube;
The shroud includes a cap axially secured to a distal end of the inner tube; and
該Ro click is A direction end of the stent graft, while located still inside the cap with the still allow movement of axial and radial stent graft, in the configuration of the A direction end of the stent graft diameter was bound Part of the holding mechanism attached to the outer tube for holding;
However, the delivery system.
保持機構が、ステントグラフトのA方向端である近位端を直径が束縛された構成で保持しながら、ステントグラフトの残りの遠位部分の部分展開を可能にする、請求項9記載の制御されたステントグラフト展開デリバリーシステム。10. The controlled stent graft of claim 9, wherein the retention mechanism allows partial deployment of the remaining distal portion of the stent graft while retaining the proximal end, which is the A-direction end of the stent graft, in a diameter-constrained configuration. Deployment delivery system. ックが、ステントグラフトのばねの複数の頂点を保持するための複数のリブを含む、請求項9記載のシステム。 Lock comprises a plurality of ribs for holding a plurality of vertices of I field of the stent graft of claim 9, wherein the system. システムが、外管に相対的な内管の制御された共軸移動のための手段をさらに含む、請求項11記載のシステム。The system of claim 11, wherein the system further comprises means for controlled coaxial movement of the inner tube relative to the outer tube. 制御された共軸移動のための手段が、外管に取り付けられたねじ込み部材に沿って進むことによってロックを先端のシュラウドの中および外へ移動させる、内管に取り付けられた回転カラーを含む、請求項12記載のシステム。It means for controlled coaxial movement, by that proceeds along the threaded member attached to the outer tube to move the lock into and out of the tip shroud, mounted on the inner tube rotation The system of claim 12, comprising a color. 保持機構が、溝を有する後ろ板およびロック留め具をさらに含み、該ロック留め金は、該ロック留め金が後ろ板の溝から開放されるまでロックをキャップと結合する、請求項9記載のシステム。Holding mechanism comprises further a backplate and lock fastener having a groove, 該Ro click clasp, the or Delo click to該Ro click clasp is released from the groove of the backplate The system of claim 9, wherein the system is coupled to a cap. ステントグラフトの残りの部分が展開されながら、ステントグラフト上のA方向端と反対の端である遠位端を展開しないで保持するための第二の保持機構をさらに含む、請求項9記載のシステム。The system of claim 9, further comprising a second retention mechanism for retaining a distal end opposite the A-direction end on the stent graft without deployment while the remaining portion of the stent graft is deployed.
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JP2013255843A (en) * 2007-10-25 2013-12-26 Symetis Sa Stents, valved-stents, and methods and systems for delivery thereof

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US7264632B2 (en) 2007-09-04
US20040093063A1 (en) 2004-05-13
US20080021538A1 (en) 2008-01-24
EP1369098A1 (en) 2003-12-10
US7815671B2 (en) 2010-10-19
EP1369098B1 (en) 2014-04-09
ES2475515T3 (en) 2014-07-10
EP1369098B2 (en) 2020-09-16
JP2004130068A (en) 2004-04-30

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